/Engine/Source/Runtime/RHI/Public/DynamicRHI.h
Called by the thread recording an RHI command list (via RHICmdList.WriteGPUFence()). Allows the platform RHI to perform operations on the GPU fence at the top-of-pipe. Default implementation just enqueues an RHI command to call IRHIComputeContext::WriteGPUFence().
virtual void RHIWriteGPUFence_TopOfPipe ( [FRHICommandListBase](API\Runtime\RHI\FRHICommandListBase) & RHICmdList, [FRHIGPUFence](API\Runtime\RHI\FRHIGPUFence) * FenceRHI )